USER FORUM
(you are viewing a thread; or go back to list of threads)
Thick red lines (by Samu)
Hi,
Does anyone know what the thick red lines represent.
I have attached my file.
Thanks,
Samu
Does anyone know what the thick red lines represent.
I have attached my file.
Thanks,
Samu
(no subject) (by Paul)
The red lines are due to a NURBS boolean failure. The difference operation in the last group is failing - edges are missing.
I was going to suggest that the 2 round 90 degree curves you're cutting are the same problem as issue 1291 here:
https://github.com/solvespace/solvespace/issues/1291
The workaround is to make the corner cut so the straight sides are not coincident with the existing extrusion faces as shown in the link (it's shown with no error).
I tried this with your sketch and only the 2 curved surfaces improved, there were plenty of red lines remaining.
For now the best solution might be to get the entire shape constructed in the first 2D sketch to avoid having to take a difference. You'll want to use some construction lines and "split curves at intersection" to get those arc right.
I was going to suggest that the 2 round 90 degree curves you're cutting are the same problem as issue 1291 here:
https://github.com/solvespace/solvespace/issues/1291
The workaround is to make the corner cut so the straight sides are not coincident with the existing extrusion faces as shown in the link (it's shown with no error).
I tried this with your sketch and only the 2 curved surfaces improved, there were plenty of red lines remaining.
For now the best solution might be to get the entire shape constructed in the first 2D sketch to avoid having to take a difference. You'll want to use some construction lines and "split curves at intersection" to get those arc right.
(no subject) (by Sam W)
Not sure if you still needed the help Samu, but I made a couple examples for you. One implementing some of what Paul was talking about by using tangents in the first 2D sketch layer, and another modifying your original TriLeg.slvs file.
I'm not sure what all the reasoning is, but the main issue in the original is the really tight angles on the rounded outside corners at the top of the model. In this first example, I added a little space which fixed the boolean failure. I didn't change anything else.
I'll post the other example in the next post.
I'm not sure what all the reasoning is, but the main issue in the original is the really tight angles on the rounded outside corners at the top of the model. In this first example, I added a little space which fixed the boolean failure. I didn't change anything else.
I'll post the other example in the next post.
(no subject) (by Sam W)
For this alternate example, I used tangents for a few corners but found using the circle differences in a separate sketch layer maybe an easier approach than trying to get a circle arc to match exactly.
(no subject) (by Sam W)
I also went ahead and implemented it in a single sketch layer just in case it is needed (and to see how hard compared). It wasn't too much harder if you thought about it in advance.
Post a reply to this comment: